Mo Willems uses a cool blend of illustration layered over sepia-toned photography to bring to life this tale of would-be woe, as toddler Trixie escorts her dad to the Laundromat but returns without her beloved Knuffle Bunny. Since Trixie speaks in pre-verbal babble, she doesn't have the words yet to say what's wrong, but after Dad (eventually) saves the day, they finally learn to understand each other. (Recipient of a 2005 Caldecott Honor.)